FLUID-STRUCTURE INTERACTION ANALYSIS OF A THICK-SECTION COMPOSITE CYLINDER SUBJECTED TO UNDERWATER BLAST LOADING

The dynamic response of a thick-section hollow composite cylinder, und er plane-strain conditions, subjected to an external blast loading, wi th and without fluid-coupling effects, was investigated using finite-e lement analysis and effective modulus theory. The blast loading profil e is representative of the primary pressure pulse created by an underw ater explosion occurring far from the cylinder. In this analysis, flui d-structure-coupling effects were included by employing a loading rout ine in the finite-element analysis. A plane incident pressure wave imp acting the cylinder and propagating around it with a fixed velocity, w as considered. The effects of reflected and radiated pressure componen ts were included. The accuracy of effective modulus theory in dynamic- stress analysis was briefly explored. A commercial finite-element code , ABAQUS, was used for this analysis. (C) 1997 Elsevier Science Ltd.